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Do not fold -C*ABS<n> to ABS<-C*n> (i.e., do not move negative constants

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inside ABS expression).
Obtained from:	Richard Guenther <rguenther@suse.de>
Approved by:	core
This commit is contained in:
David E. O'Brien 2007-12-11 03:35:39 +00:00
parent df954420dd
commit c817ff638d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor/gcc/dist/; revision=174531
1 changed files with 3 additions and 0 deletions
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contrib/gcc/fold-const.c
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@ -5661,6 +5661,9 @@ extract_muldiv_1 (tree t, tree c, enum tree_code code, tree wide_type,
}
break;
}
/* If the constant is negative, we cannot simplify this. */
if (tree_int_cst_sgn (c) == -1)
break;
/* FALLTHROUGH */
case NEGATE_EXPR:
if ((t1 = extract_muldiv (op0, c, code, wide_type, strict_overflow_p))